It seems that the week long revival is a thing of the past. Why are churches getting away from revival services? Paul said that not all ministers were pastors. How does an evangelist get more places to speak at?
Go preach.
BUT FIRST: Spend a LOT of time in prayer.
You no pray - you no preach. OK?
When you consistently draw big crowds, pastors will contact you and beg you to come and preach at their churches with the hope of filling their pews with big check-writers hungry for good, Christian, ear-tickling, entertainment. The bigger the crowd you can draw, the bigger the church that will invite you and the bigger the honorarium they will offer.
If you get really well known, denominations will contact you begging you to join them and go on their TV broadcasts so people can send money to them too.
Oh yeah, a few people will get saved.
What??? Cynical???
Who, Me???
How many synagogues asked John the Baptist to come and preach?
Why?
But, really. Don't look to pastors to validate your calling or to give you an opportunity to preach a revival to "their" sheep on Sunday morning. (When the main collection is taken) God will validate your ministry with signs, wonders and miracles IF YOU SPEND THE TIME IN PRAYER NECESSARY TO LET THE HOLY SPIRIT PREACH THROUGH YOU.
Maybe you can get a shot at the Wednesday night Bible-study crowd. Don't despise small beginnings.
Preach the gospel at all times; if necessary, use words. Francis