Do i really have to restart the process of doing  a 30 day notice starting from the time he last made partial payment in october? 

Make sure it explicitly explains the process for termination if you are unhappy with their services, especially if they violate the terms of your agreement.3.

At what point do I tell them I’ve had enough and start the eviction process?

They are more likely to not pay there portion of the rent, more likely to destroy your house, and more likely to squat / drag out an eviction process as long as humanly possible. 

Following up with mass amounts of excuse and ghosting so I ended up starting the eviction process per usual.

Can someone please let me know the mechanics of the recording process on an owner-financed deal?

There has to be an account in the middle for repairs, renovations, etc. and you want to know how that will be disbursed and if you need a workflow between you.If you decide to do it, just start small with an asset that is as close to can't lose as possible so you can fine-tune your collective process.

The process of selling is a bit more complicated and is a much larger transaction that can have a lot of nuances depending on the deal.

There are going to be three levels of addressing this 1) things you can simply go there and do anytime (pick up pet waste and throw it away) 2) things you can do given proper notice (enter the unit and inspect, repair damage etc) and 3) things you can only do given proper process/procedure (notice to vacate, increase rent etc.)

Thanks for calling.If they fill out a written application, then you will send them a written denial.You don't have to process the entire application, either.