( new kitchen, adding square footage, facelift etc)Third, due to being in a situation where I can save money and be flexible with my time due to my job, what are the best steps that I can take now towards making money in real estate in the future? 

the unit is 1000 square feet.costs:Flooring $1.50' (LVP)Trim Molding $.68Cabinets $2,200 assembledCountertops $150Tile $1.30 footHVAC $3,900Paint about $500Appliances $900Vanities $200/eathat's a basic list plus all the other expenses!!

Square footage?

Increasing the square footage of the usable living space is the best way, since cost per square foot is how comparable sales will be used to evaluate the value.

I now run a building department and have been on the government red tap end of the spectrum for about 10 years.

I suspect the culture in Ohio will be similar.For "systems" I'd say to make a standard packet of info that has a sample lease, floor plan with square footage, list of "features" like what appliances are there or if there are storm doors, etc., an introduction letter, and an application. 

That always sets off red flags for me.

What are the typical construction costs in the area per square foot for an average rehab?

Having bad credit is a huge red flag to lenders.

If they are unable/unwilling to provide you with a clear explanation, that's a red flag.Some of this could be innocent.