It can be some dry reading but that's where you will find the most accurate information regarding landlord/tenant laws and even those are not always immediately updated to reflect the most recent changes so you still have to be careful. 

You will need to plug the holes with filler or putty (or just leave them) and possibly re-poly the floor.I've also heard of people spreading talcum or baby powder on the floor and working it into the cracks of the floor to act as a dry lubricant and reduce squeaking. 

If you ripped the whole nice porch down because it was rotted and replaced it with 3 steps and a railing you will still get the same rent and save possibly over 10k

The roof has several holes in it, old water damage with large spots of rotted wood, and several boards completely collapsed in the roof and the gutter is sagging among some of the highlights. 

Its not a cut and dry answer. 

If that dries up again as it did a few years ago, your occupancy may go way down.I have a friend in Big Spring who built one RV Park, ran it for awhile, sold it, and is now building another one.

Maybe they were dried in the sun instead of fired, but there are homes all over Austin with that brick.  

Is this a high moisture area like a basement floor or just a concrete slab in a relatively dry climate?

Basement was bone dry for the time we owned property.  

After I'd gotten those properties going and kept my powder dry (cash in the bank and continued to earn and had those houses paying for themselves) then I would either refinance the third house into conventional financing or purchase another home to live in using Fannie Mae or Freddie Mac or if the property is right, find a distress sale that will do owner financing.Be creative.