I have saved and organized electronically all receipts for expenses as well as improvements on the property. 

BiggerPockets (BP) does have some tools and templates that can help keep you organized (like checklists for inspections, title, and earnest money).

As an investor in Columbus OH myself, I would say the best neighborhood for multifamily units is the Clintonville/Old North Columbus area.

"Class B neighborhood"...

I have heard Texas and most areas would be closer to $100 when its all said and done.You can find good contractors through realtors, HBA in your area, REI Facebook groups and meetups etc.Make sure to check references of past and current clients, visit some jobs in process as you can tell a lot about a contractor by how the job site is kept up and organized.

Here are a few things I’ve learned along the way:Check Out the Neighborhoods: Take the time to explore different areas.

I found this deal through "driving for dollars" in a neighborhood near the planned casino development.

I’m just getting started with my 1st and hoping to use the available resources to help with organization & efficiency.

Even if it has some renovations we can work with that if it’s in the neighborhood we want.

When I added all this up, it was going to cost $150k in a neighborhood where sales comps trade for $100k per unit.