Rainbow Park is an unincorporated community and census place in western Marion County, on the northwest side of State Road 40, about 14 miles west of Ocala and 10 miles northeast of Dunnellon (Wikipedia and U.S. Census, 2020 census place population 1,672). It is part of the Ocala metropolitan area, with an Ocala 34481 mailing address.
The area is platted in numbered units of large country lots, and Unit 3 is one of those platted sections. This is acreage-style country living rather than a uniform subdivision: lots are typically served by private well and septic, original lots commonly carry no mandatory HOA, and housing is a mix of site-built homes and lots ready to build (City-Data Ocala forum and local listing guides).
The Rainbow Park name covers a country setting, so the money is made or lost on the specific parcel, the well and septic, and an honest read of an existing home's condition or a new build's cost, not the headline price.
The pitch is country space plus location: large lots and low carrying cost off State Road 40, with Ocala, Dunnellon, the Rainbow River, and the World Equestrian Center all within a manageable drive. The work is reading the lot, confirming any recorded restrictions, and budgeting well, septic, and condition before you fall for a price.