Noone really can answer this for you.
Output of LA definately depends on what you do with the LA.
Leaving it without fertilizer as pure mining LA, maybe with a few numbers young mobs from unfertilized DNA.
Fertalize it to provide higher maturity of the mob DNA installed as a clean spawn for bronze missions.
Organize regular events, dosn´t matter if its set at control tower, or some longer events (month based) at forums.
Such things have an impact of how much your LA is visited, and how much you will earn from it.
Beside that there are other things that should be considered.
Do you plan to buy your own TP for your LA or does one already exist.
LA prizes range starts from 100k (lately seen at auction = Ouro Island/Medusa)
Some LAs at Ark got sold for 150k
There is some good LAs around that surely will sell for 250-300k PED maybe even more.
Witch LA, what DNA, what improvements exist, location, ores that could be found there, so many things could have an impact on the value of an LA.
As said nobody can answer that for you, how much you should be willing to pay for a LA.