Charlie,As an alternative to the SW Florida area, you might consider The Great Outdoors (TGO). We are located in Titusville, in the East-Central Florida area, near the Kennedy Space Center. Cape Canaveral National Seashore is about 20 minutes away, and Cocoa Beach (and Ron Jon's Surf Shop) is about 25 minutes. A big advantage of this area is that traffic is light in the northern end of Brevard County, so most travels out and about are easy (e.g. to Wal-Mart). We find that even Cocoa, COcoa Beach, Melbourne and the like are far less congested than the west coast.
TGO is an RV community. gated and guarded, with typical RV amenities available - pool, laundry, golf (fee), daily trash pickup, etc. All 1,600 sites are individually owned. The most basic sites have concret pads with full hookups (50A and cable); the upper end have $1M houses with RV garages. Individual sites are rented either directly by owners or through TGO Realty (go to www.tgoresort.com).
Current seasonal monthly rates through TGO Realty are a little higher than you requested ($1,150). Individual owners often rent for less but unfortunately you do have to be here to get their contact information so it only really works for someone who is not a first-timer to TGO. RV houses ("resort homes") rarely are rented, but park models and villas often are available.
Hope that this provides you another option.
John ComeauF394318