I have also been doing quite a bit of research on Loan's, tax consequences etc., and am working towards being a expert in this niche.  

In addition to conventional loans and FHA loans, if either you or your wife are veterans, the VA also has a rehab program.I'd be happy to discuss my rehab experience both as an investor and as a mortgage broker, and at least help you think through your options. 

What is the minimum amount of profitability acceptable at a $60 million loan volume4.

I ran my own custom proforma for a bank loan using the asking price that would generate a cap rate over 10% and CoC just under 20%.

Due to the popularity and scarcity of these properties in Nashville, it would be difficult to find a property meeting the STR requirements given a proposed purchase price of ~$300-350k.Additionally, your situation is a bit unique as it sounds like you may be living away from your primary residence more often than not, and as such, I also recommend you confirm with a lender whether this situation would qualify for this type of (primary residence) loan.

They finally get back to me after the close date to say they need more time because they are try to cross collateralize their other properties to make this deal happen and the bank they were using doesn't do this kind of loan. 

I recently came across 1 acre asking for 314k in a very good residential and growing location, so the current owner has added 4 manufactured homes with 4 electrical meters, 4 septic tanks and only 1 water meter for all 4 homes, the homes are sitting on partial slab and partial pier & beam, he also added 2 storage sheds approx. 380sqft with the intention to make them ADUs they are still only the shell so I would have to get those ready to live in, so currently the 4 manufactured homes are being rented and bringing in 2800k a month, 3 of the homes are needing some TLC which could increment rents and possibly get me at 3600k a month, also being a 1ac lot this still leaves about 12,000sqft of raw land where you could build etc.So that is on the good side now the things I did not like so much, the lay out is poorly executed to where it makes it looked crammed up and not professional but it could be fixed.Another is that in reality there is only 4 livable units so that qualifies under a conventional loan but since they're are 6 units on the property the banks are wanting to take it as a commercial so we would have to move out the 2 storage sheds out in order to close as conventional.Another concern, technically you are only allowed to have one manufactured house or single wide in your property according to what I know but I know it could change according to zoning which I will investigate, so my question is has all this been accounted for and if so how can I verify it so it wont leave me in a bind further down the road, I currently asked my agent for the appraisal of the property to see if that might verify.Any recommendations?

I spent years there in Jackson did probably 1000 flip loans to locals and owned at one time 200 sfrs..

When I asked for a loan, they asked if my business received money in Euros. 

We've worked with local banks and been able to finance the three we own without any issues.I don't necessarily know if it's "beginner" investor friendly but you'll learn everything you need in the bootcamp which is the gold standardWe get loans with 3-7 year balloons and 25 year amortization typically