Rigid MTB frames are a rarity now,
I'm bound to observe every hard tail MTB has a rigid frame.
You seem to have taken against my advice to fit a rigid fork, but it does make sense for some users.
Buy a £500 MTB, fit shallow tread tyres and a rigid fork, and you have a capable town/cycle path bike for £600.
Some after market rigid forks have bosses, which also gives you a load lugger and a flat bar tourer (you already have the right tyres and gearing).
You could probably flog the unused sus fork, which would knock a pony off your overall bill.
I'm no fan of cheap sus forks, but they don't make a bike unridable, and they do have their uses.
The OP has posted about there being loads of speed humps on his commute, which he doesn't reckon to slow down for.
No harm in a bit of boing in the front end in that application.