Can all rentals be used by one credit card and one separate checking account then have another of each for personal stuff?

Then check out other stuff under the education tab and ask your question here. 

I recently just wrote some stuff in a notebook of mines some quotes."

If you aren't already do all the standard personal finance stuff, like maxing out 401k's, backdoor IRA's, HSA's, you should.  

@Brad CoyneFirst Interstate Bank has some great lending stuff right now.

Nice enough, but the landlord wanted certain stuff done.

It is clean and safe, but not overly nice, and there is a major eyesore property next door to this one.It has new siding, new paint and new floors and does not appear to have super aged water heater/ac/roof but I intend to have a home inspection to verify the big stuff.

Awesome stuff

Forget about the complicated stuff like cap rates, which aren't really used on single family, and definitely don't buy hoping for appreciation.  

let's buy/sell/rent houses together...and stuff.