Hi,
It depends on the strains that you choose. Remember that there are strains that grow high (col de dame, bourjassotte ... ) and some that are sort of dwarf (Dalmatie, LDA).
It is my opinion, that figtrees should not be trimmed every year, or they don't produce as much as they could. In my Zone7, I'll be pruning every 5 years ... 2017 (2012 killing winter + 5 years ) is that year for some of my trees ... I'll do half of them this year, and the other half, next year or the year after.
For spacing distance, I use 2 meters (7') as I'm restricted on space. I have some closer but shading is a problem then.
Don't forget to fertilize and water accordingly ... More trees require more water and more fertilizer or manure.
Planting in a pot ( 30cm * 30cm deep - 1'*1' or bigger ) with bottom removed seems so far to have a dwarfing effect on trees ... while protecting the roots from the wandering under-ground rodents ...