Home value is $156k according to appraisal district(I know that is not accurate).

You buy an asset (car), transactional cashflows are really high (renting it out), and then you sell it, or more accurately, dispose of it (sell to general public after is been depreciated).

Is not an accurate way of looking at it. 

U cannot understand the risk in some of the mid west deep south north east without going there and seeing for yourself.but if you simply want SFR's every city has a median price point.. we have one here in our area for SFR which is closer to 350 to 400k but like say INday for instance its 130k.. you buy at the median and your buying were homeowners are buying and some investors. you buy at 75k and your in an area that ONLY investors buy in.. and your values will ONLY be worth what the cash flow is. its all about balance.. risk reward.. and of course I don't subscribe to the cash flow is the only thing and appreciation is gambling NOT at all. 

The process was pretty smooth and the numbers are accurate.

This is often the best way to know if the rents are accurate.

The taxes I just used the proposed tax rate off of the county website multiplied by the purchase price (I know that’s not going to be entirely accurate but I thought it was a decent starting point).

How can i determine accurate ARV?

I would imagine $45k would only cover a light remodel for each unit (new paint, new flooring, new light fixtures).To estimate costs accurately you should really be walking the property and creating a detailed list of the repairs and costs for each item.I would recommend getting The Book on Estimating Rehab Costs to help you learn the basics.I have a spreadsheet in my fileplace that may be helpful as well:https://www.biggerpockets.com/files/user/drobertson/file/house-flipping-spreadsheet-6-lite

So now I mostly hold SPY and "gamble" on some individual stocks.