Clearing potential building sites.  

Costs a lot less to do all pad sites together versus individually. 2.  

There is a ring camera system that has a job site security package as well some of my investors use for their projects do not have internet it works off cellular connection. 

The other site that I would be looking at is meetup.com as well, they have a lot of meetups in your area that you can attend to get in front of people doing the stuff you want to be doing.  

Janine, I have had a lot of trouble with mobile home park on-site managers.

I would check with Dennis Kahn at Homestead Mortgage or another popular mortgage broker here, Zach Starnes or there are several other lenders that can re-fi off appraised value much sooner than 1 yr.

A great REALTOR will help you gather rental history and the cost to own and show you good sites for pulling rental projections, but you will need to do your own calculations.Everyone's mileage varies.

On the site you will find lots of educational videos and networking opportunities he has put together.

For the community development dept, you'll need proper plans (architect), site survey, permits, etc. when you're ready. 

One of the sites I like to check (https://apartmentloanstore.com/seattle/washington/cap-loan-r...) peg this between 5.15% and 5.70% (assuming it's in the suburbs).