I am selling my favorite property. The house is

I am selling my favorite property. The house is self-sufficient so costs are zero and there is an annual profit of 30 thousand CZK from selling electricity back to the grid. The house has many advantages such as underfloor heating throughout the entire home, CCTV cameras connected to a monitoring station, security alarm linked to police control room, heat pump plus another one for the pool, air conditioning, triple glazed windows, solar panels generating 34kW. There are 250 square meters of living space in total - on the attic you can build additional bedrooms or anything else needed. I am willing to negotiate price or pay part upfront and then take over by lease.