No matter what your intention was with the land, the fact you do not
own a home or how unfair the law is you are not entitled to the CGT
main residence exemption on vacant land. This is because the exemption
only applies to dwellings and the land attached. No dwelling no
exemption. So build or put a caravan on the land and live there for 3
months to get the exemption back dated for 4 years before you lived
there. But make sure the caravan is sold with the land.
Please seek advice on your particular circumstances before acting on this information.