A meeting of the condo owners is required to approve the collection and the foreclosure procedure. If the condo association is in order, there should be no problem in foreclosing.
Of course, if the debtor fights to the death, it could take long, but for this he would have to pay a good condo lawyer and this means high legal fees. If he hasn't been willing to pay condo fees, I assume he won't be willing to pay much more to a lawyer.
Being sure the condo association is in order is of the utmost importance. Likewise being sure that meetings of the condo association at which actions are taken against the dead beat are completely in order, that all the procedures for assemblies stated in the rules of the association and the condo law are followed to the letter. I say this based on the experience of the condo where I live.
There was a Dominican owner who did not pay his fees and was taken to court. He lost in the land court but appealed. The stay was granted because the non-payer showed that there was an irregularity in the meeting at which the action had been approved. I don't recall exactly what, but something like the notice of meeting was not sent by required date, or an illegible person was a proxy in the assembly...something like that. The sort of thing that nobody pays any attention to when things are going well.
The condo appealed and again there was some irregularity. Same on the next appeal by the condo. This went on for a long time, and the condo was also paying legal fees.
Finally the condo gave up and bought the apartment, taking some credit for the unpaid fees but still paying money to the seller---who made out better than the condo did, but at least he was gone.
Hopefully your guy is not one of those who would rather pay legal fees than maintenance fees.
But be on notice that if there is any irregularity in your rules or or in the process of foreclosure that it will be to your detriment.