Every system you try will have flaws, or you may salivate over a feature that appears in other software.Some familiar names are mentioned frequently: Stessa, Apartments.com, RentRedi, TenantCloud, Innago, RentManager, Avail, Rentec Direct, Doorloop, etc.I recommend conducting thorough research on each app online to understand their offerings, pricing, etc.

Software can be very subjective.

If the appraisal deems it to be "Subject to" you will have to use a renovation loan/construction loan to repair and close. 

The difference in locations between one mile and five miles could be highly subjective and difficult to nail down.

In terms of is it a good deal that is completely subjective.

Like you mentioned, frequent crashes, problems uploading photos, weird restrictions on what words can't be used, listings removed for no obvious reason. ....and, to me, the navigation/operation is very unintuitive and cumbersome.

.: I'm curious how CA agents can make a living with laws like AB2992 that state:"If the out-of-pocket costs to pay their agent remain too great and the seller and buyer have not yet reached an agreement on the sales price and/or terms, the buyer may walk away from the subject property provided there is an exit clause, proceed without representation, or approach the seller's agent about possible dual agency representation." 

I have quite a bit of knowledge on the KC/STR subject. 

This ultimately why the $100k midwest single family homes are frequently discussed in these forums.....its what many are able to afford to buy.

Like @Nicholas L. said, maybe look within a reasonable driving distance from where you live, is there any city or state where you have family or friends that live there where you could travel to frequently and they could keep on the property for you or somewhere you visit a lot.