Tiny Home Neighborhood - Septic System Advice

[Zachary Hickman]

I'm working on developing a 15 acre plot of land in "rural" Florida and could use some advice. 

It's currently zoned agriculture and we intend to keep it that way for the time being. Zoning allows us to build tiny homes on the land, up to 6 in total. We have already purchased the land and have enough equity to build the units and some infrastructure. The reason to not rezone is the need to build a lift station, which would make this cost prohibitive. 

Instead we're going to use well water and a shared septic system for the 6 units. City and Civil says this works and we're good to move forward. 

All 6 units will be rentals. Additional phases will be built in the future after phase 1 is stabilized and has positive cash flow.

Question to this forum is, what sort of potential future issues will the septic system cause for future phases? The current thinking is that these units will eventually be connected to the city sewer/water system. I'm picturing that the leach field will either be built on in the future or used as open space. 

Any advice and thoughts would be greatly appreciated!