Request copies of invoices of all work done to the park for the past 3 years along with your due diligence paperwork.

He emails me his invoice whenever he feels like it which could be a month or more.

Just submit an invoice and proof of payment and add it to the draw.

Banker out first invoice to pay for the lot and building permit.

Enter a maintenance request, assign a vendor, attach a fake invoice.

., invoices, etc.-- may be required.

Great, let's look at that active license to plumb from the State of California as well as a recent check or two from a client with a matching invoice/receipt from you. 

You may have to send pictures and invoices to get draws, but that's pretty easy.

The property management & contracting business is one that is easy to abuse, you'll need a full-time staff of qualified people to tear up *every* invoice looking for fraud & abuse & a network of field reps to inspect the jobs.

Writing up an invoice at the end of the month is way way easier in my experience, and makes the owners happy because their bank account gets the money.Then add yourself to the other contact (email and phone number).