There is "No rebuttal" to this question trust me I have seen a hundred scenarios over my 18+ years in the mortgage banking world.

Certain organizations such as the AICPA and the State board that issues the CPA license mention what a CPA can / can't do to retain his / her license.Providing a comfort letter is an 'attest service'.Furthermore, CPA firms are encouraged to have insurance, which may mention that the firm can not provide comfort letters.What the mortgage company is looking to do is potentially have another person to go after if the mortgage goes south.It is not worth it to a CPA to get a few hundred dollars but potentially get a lot more in risk exposure.

Can you imagine getting outbid by a couple hundred thousand on your dream home.

But as a co-host myself that is part of a large (several hundred) STR co-host mastermind, I can answer all your questions!

For instance, a full kitchen cabinet setup costs us 800, the front main door with glass siding will cost us 400 and the windows are costing us 30 a piece.

I've bought a few SFH and in Florida and they only up several hundred (a thousand max) in a year.Also, I don't think there's any way for a SFH or Duplex to make $5k per month cash flow, so are you referring to 8+ unit apartments?

You may have to analyze a few hundred deals to find a good one. 

Getting such loan is actually easier in many cases than conventional financing, I've done it personally, hundreds of my clients did it, and thousands of other BP investors did it. 

I'm a step or two away from launching and I can't seem to find anything that shows me how to integrate into Pricelabs without going through BookingSync and paying a few hundred bucks for setup.

Just by googling 'buy a house in Nicaragua' I now found the cheapest SFH going for $44k on one of the brokers' websites, a lot of them in the hundreds of thousands USD.