It does seem like users of both platforms really like them, so it may be a matter of just choosing one and going with it. 

After several months of trying to get code enforcement to clear us and not getting any response from there end, and escalating to a superior who apparently did nothing, we considered the matter closed.

If that's the case and you aren't viewing more properties in person than you are making spreadsheets on, you are destined for analysis paralysis.Spreadsheets can only tell you estimations based on numbers given to you online or by a real estate agent whose job is to sell the property.

Just a matter of putting it together. 

The other half of the accounting records is coming from online purchases, utility payments, etc etc where they are sending you an email. 

The difference is night and day between using someone you find online or in a search vs a personal referral. 

If we do decide to do this, is it just a matter of getting it put into writing or is there more to this?

To find a home inspector, you can look online via homeadvisor or thumbtack. 

Offered $20k over asking within a week of it coming online.

Online Facebook groups can be fruitfulOnce you find a property things tend to move fast so have a good contractor available to help you estimate repairs.