(BOA)  I do not want to put myself in a position that might cause them to call the loan.I wonder if I could refinance the property plus enough to make repairs and hire a contractor to get it back in shape.  

I think maybe getting my mortgages through a bank like that might make sense but do my day to day banking through a bank like Chase or BOA since there's branches at both ends.

Our customers included HCA hospitals, Motorola, BoA, etc.  

interesting point,  I bank with BOA because of the mobile apps and mobile check deposits bill pay Apple Pay etc....basically convenience of features.  

Lenders use over 10 different version of fico so the pull at BOA could be different than Wells Fargo.Also ask yourself does it effect you mentally to walk around with 500 fico ( won't really drop that much) but to me I don't care what my score is.

Create bank accounts virtually for the entity (boa has this). the main thing is, it will hold all your properties, then you make one llc/corp to hold EACH investment (well, probably two). see an attorney, if there is too many people in an entity, there will be a lot of complications, like in case of death/disability/divorce, etc.

Most of the buyers are HUD and the V.A. and the sellers are banks such as Midfirst and BoA.

Are they just like any large provider (IE USBANK/BOA) where their rates are meant to just get the lazy investor?

In contrast, we had someone break into the washers and dryers on numerous occasions, a drug dealer, a pot smoker, a gal who had boa constrictors, and more issues in a month than my 9 SFRs had in a YEAR. 

So, hopefully, your cards are spread out amongst Discover, Chase, Wells Fargo, BOA, Cap 1 etc...The pro's of using credit cards are all you imagine Easy AccessUsually deposits within 10 days of requestLow cost (mine are 2-3%) for 15 or 18 monthsThe 2-3% fee is rolled into the balance, so I don't really even pay that up front.The cons I've found to be as follows:After about 40 days of cashing checks, my credit score drops about 50-75 points and it takes 4-6 months for it to rebuild after the balances are paid.