A national bank gave me a 15-year fixed rate at 3.625%. 

Lots of churches don’t file taxes but banks will look at the number of members and estimate out per member what the church receives.

Some industries are looked at as high risk and banks won't touch." and since I want to establish business credit and financing for my next flip, this could be an issue. 

I have the bank information and intend to reach out to them to see what information I can dig up.

My bank allows it.

Your best bet is a construction loan from a bank that you can turn into a traditional mortgage after its built.

If you think you’ll need to invest additional capital in them in the near future then you should make sure you know exactly where that money is coming from before you buy the property since your future employment is in question.The bank will look at your current financial situation, but they don’t typically inquire about your future state.  

I currently have 25k in the bank and I’m looking to purchase another property up to 150.

By asking for owner financing, you aren't really providing a high level of credibility to the buyer if someone else comes along and shows them a bank statement with half-an-M in the account.

The banks have done this for me just for the asking and didn't charge anything.