Initially many offices were giving 5 year licenses on renewal, I was renewed for 5 years while on a DTV (no longer am) but this is office dependant and I believe become less common.
You will have to ask the office you intend to renew at if they offer it. You absolutely can obtain another 2 year license, that is offered to anyone even people without any visa at all.
Many branches accept married or condo owners having accounts on a DTV.
As is often the case, there's no actual ban just guidance and local decisions. Deposit a few million baht in the bank and watch those 'rules' just fade away.
Enforcement of the rules appears inconsistent even non existent, that confuses westerners for some reason. Why I don't know as that's the same on almost every rule here aside from 112.