We would plan to take our current main location which is the largest and downsize in the same business park. 

Aloha from the Big island.

Frank Rolfe of Mobile Home Park University, who is the 6th largest owner/investor in mobile home parks in the US according to Wikipedia, advises against developing a new mobile home park.

Should I try to get pre approved for the largest loan amount available (and I'm comfortable without being over-extended)?

I also interviewed the CEO of the Pittsburgh Cultural Trust(One of the largest RE holders in Pittsburgh) one on one.

I pick the largest office and question the officer experience. 

There are some great meetups in your area; the BWI meetup comes to mind (it's one of the largest in the country) as well as Greg Bennett's meetup at the Greenbelt Marriott and Andre Johnson's Deals Meetup at National Harbor. 

Check out bizbuysell it's the largest website for small business sales .Can search for businesses for sale in your area and see which brokers service .

Land is land, and there's not anymore being made.

Incredible returns, no rehab needed, and you can buy/sell all over the country (since you are on paradise island!).