A: It depends on how your mobile home park is organized. If you have a mandatory HOA (you own the lot and the home), then it would be in Fla. Stat. 720.303(1). If you rent the lot and have a voluntary HOA pursuant to Chapter 723 Florida Statutes, the park owner is not required to record the bylaws and it is implied the HOA is to record the bylaws in Fla. Stat. 723.079 where it discusses having adequate copies of the "recorded governing documents" to provide owners who request them.
A: You need to send a certified letter, return receipt to the registered agent of the association (look for your association on www.sunbiz.com) requesting to inspect the official records. Requesting copies of documents is not a proper request and the association has no duty to send copies. The association has ten business days from the date of receiving your request (that's why the return receipt is important) to give you access to the records. At the inspection you can make copies for free with your own smart device or pay the association $0.25 per copy for any copies over 25 pages.
A: Buying and selling property, especially new construction, without a real estate lawyer. I know that doesn't help you now and you will need to hire a real estate litigator or a construction law litigator to review your documents related to the sale and construction to get this resolved. The well may be a real issue if it is in a drainage easement. Any complaints to code enforcement or the water management district would result in violations and possibly fines against you, so contact someone immediately.