2) If we work out the details, and proceed without the help of VRBO, should I make him sign a simple month to month lease?

3) Does the developer also responsible for sale/leasing of the property after construction is over?

There will be no broker involved in the lease negotiation.

I paid cash and am going to refi cash out with a local credit union once it is fixed up and leased out, then buy another house with the $$$.

As subject to, lease/option, wrap or all inclusive trust deed deals.  

I've been renting a house for awhile.. years actually.. and it has every problem you can think of.. mostly rats and bugs because theres holes and cracks in the doors and places in carpet where mice or rats been getting in and out. then guy raised my rent so i could get pest control but only does it like every 10 months. just say i found something better but the real question is this if i give my landlord a 30 day notice (im not on a lease) but the place im trying to move to might not actually be ready for maybe a week or two after the 30 day notice so in that time ill be homeless if i decided to move out after the 30 days..

I am waiting until end of 2019 to sell it because that is when the lease ends and it will be tenant free making it more valuable from my understanding.

Lease may be required to support it.

Also, if you have tenants in place, you'll have to wait until your leases roll over to implement this charge; however, I would think you'd have to do the same if you sub-metered and wanted them to start paying for their own water.

However, we had 30 day minimums and did lease agreements, as well as guaranteed tenants so it was a much different model.