All at once? It’s either monthly with fees or a whole year of payments? This sounds illegal but what’s legal these days. I would say fuck this guy and give him a check every month and if he refuses then put it in a escrow account and tell him if he will only take one lump payment then he can wait until the end of the year to collect it.

By forcing lump payments they are removing your bargaining power when shit goes wrong. Withholding rent is the only power a renter has.