Evangelism can take various forms, and the approaches you mentioned, such as using the Jesus Film, mobile medical camps, reaching out to truck drivers and their communities, and the construction of church buildings, are powerful ways of spreading the gospel. Each method can be biblically justified and serve to reach different groups of people effectively. Below, I will elaborate on these approaches from a biblical perspective:
Using the Jesus Film

Matthew 28:19-20 (The Great Commission):
“Go therefore and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, teaching them to observe all that I have commanded you.”
The Jesus Film helps to fulfill the Great Commission by reaching people in remote or underserved areas, even those who may not be literate or able to engage with traditional forms of scripture. It uses visual storytelling, a method which can be more accessible to people from diverse cultural backgrounds.
Romans 10:14-15:
“How then will they call on him in whom they have not believed? And how are they to believe in him of whom they have never heard? And how are they to hear without someone preaching? And how are they to preach unless they are sent?”
The Jesus Film serves as an evangelistic tool to help people hear about Christ, especially where traditional preaching might not be possible.
Mobile Medical Camps
Medical missions have long been used as a way to share the love of Christ in practical ways. The Bible emphasizes the importance of caring for both the physical and spiritual needs of people:

Matthew 9:35-36:
“And Jesus went throughout all the cities and villages, teaching in their synagogues and proclaiming the gospel of the kingdom and healing every disease and every affliction.”
Jesus’ ministry was holistic—He not only preached the gospel but also healed the sick and showed compassion to those suffering physically. Through mobile medical camps, evangelists can meet the immediate physical needs of people while also sharing the message of Christ’s healing and salvation.
Mark 2:1-12 (The Healing of the Paralytic):
Jesus demonstrated that meeting a person’s spiritual needs was just as important as meeting their physical needs. Mobile medical camps can create an opportunity to build trust and open doors for sharing the gospel.
Reaching Truck Drivers and Driver Communities
Truck drivers, who spend long hours on the road, are often isolated from family and church communities. Reaching out to this group through targeted evangelism is an important way to spread the gospel to a demographic that may otherwise be overlooked:

Matthew 25:35-36:
“For I was hungry and you gave me food, I was thirsty and you gave me drink, I was a stranger and you welcomed me, I was naked and you clothed me, I was sick and you visited me, I was in prison and you came to me.”
Truck drivers, often away from home and community, may be hungry for fellowship and spiritual nourishment. Reaching out to them with kindness and the gospel demonstrates Christ’s love and opens opportunities for evangelism.
Romans 10:14:
“How then will they call on him in whom they have not believed? And how are they to believe in him of whom they have never heard?”
By engaging truck drivers, especially in remote or isolated locations, the gospel can reach those who may not have access to a local church or regular Christian fellowship.
Construction of Church Buildings
Building churches not only provides a place for worship but also serves as a center for community outreach and growth. Biblically, the establishment of churches is part of God’s plan to gather His people together for teaching, fellowship, and worship:

Ephesians 2:19-22:
“So then you are no longer strangers and aliens, but you are fellow citizens with the saints and members of the household of God, built on the foundation of the apostles and prophets, Christ Jesus himself being the cornerstone, in whom the whole structure, being joined together, grows into a holy temple in the Lord.”
The church is described as a temple where God’s people gather. Constructing a church building provides a physical space for people to come together, worship, and grow in their faith.
Acts 2:42-47:
“And they devoted themselves to the apostles’ teaching and the fellowship, to the breaking of bread and the prayers. And awe came upon every soul, and many wonders and signs were being done through the apostles. And all who believed were together and had all things in common.”
The early church met regularly in a shared space, and the construction of church buildings today continues that practice, offering a space for believers to gather and for evangelism to happen.