He secured the wood floor with new screws.

The beams are made of wood on the front-to-rear transverse span of the building and supported by artisanal posts (4x4 on a concrete block, piles of stones and / or blocks resting directly on the ground).

I would have to say that our biggest help in this purchase was our lender Wood & Houston Bank in West Plains, Mo they are great!

Commercial Loan with Wood & Houston Bank How did you add value to the deal?

@Michael Brown Yes interior walls will most likely be wood framed.

This leads me down a rabbit hole:This is likely a very old house.It likely has some deflection in the floors (so you are never going to fill gaps and have the filler stay)Wood joints aren't true any longer due to shrinking of a 100+ year old materialYou have a number of different patches if looking across all of the pictuers.So, the last thing I would do is refinish this floor with a natural/stain finish.If it was a section 8 grade rental or similar, I would do a sand, vacuum, and paint with a flooring paint a brown.

I have come across several properties that are wood frame and would like to know if anyone has any insight when it comes to the additional costs and risks of owning a wood frame property.Thank you. 

I went and talked to the neighbor who was splitting wood in his yard at the time.  

I read something about fire retardant paint and sold wood doors instead of hollow.

@Ahmed Elias Try King Wood Floors I believe they have one in your area.