So basically I was there early in the morning with my dump trailer and told them to clean up all their crap and hit road. 

Installed all new tile throughout, remodel 2 bathrooms and a kitchen completely (new tile, tub, shower, appliances, cabinets, counters, etc) and new Dade impact windows (I count 12) and impact doors (3) and a new central AC unit.Sold for 208k.Say they accepted 20% as their margin, that means they did 2 new bathrooms and a new kitchen (appliances/granite) and all new floors and all new trim and all new paint (interior/exterior) and all new windows and doors and a new central AC unit and clean up exterior and permits and demo for 21k. 

All told, I'm in about $1 per postcard between the list purchase and the cost of the mailings, not counting my time to go back and clean up the list I just bought.That seems like an awfully high "failure" rate to me...  

These are passive properties for me but I noticed my operating account was depleting significantly.  

Focus on cleanup when rates are bad or inventory is unavailable.

I just did a turn around on one in ORegon I bought.. same thing old family owned it totally neglectedI put in all new power hauled off 6 trailers rehabbed a few more there was a home I took to studs and remodeld an apartment.. fencing utls clean up.. and I added 3 more spaces.. and I spent about 85k on this work.. so that park being that big I would think if you have to deal with 40 or 50 derelict trailers new electrical.. etc would cost far more than 200k.. just a guess. 

Failing immediate payment, we negotiate (if possible) for them to clean up and repair the home, sign a voluntary surrender agreement, and give them 15 days to get out.If they don't want to pay immediately, and they won't agree to the above, we make sure they know we are going to take them to court to repossess and all the costs involved will be added to what they owe us.

If tenants do more damage and it takes more to repair and clean up.

They're going to be doing some cleanup work on the house this week so we will go back and see how it looks.

When I purchase a 50 unit trailer park I rented 3 large dumpster to clean up all the trash around each trailer and charged each tenant for my time but offered them for no charge to clean up them selves.