My solution to affordable recessed machine table: 30 yrs ago I found a Sauder desk at a big box store. Mine with the drawer stack on the left allows more surface for fabric.
DH removed the metal tray from my folding sewing table, cut a hole in the top of the desk following the measurements from the folding table top and reattached the tray to the desk. I’ve been sewing comfortably ever since. My Bernina 930 bobbin access is no problem as the tray width allows me to slide the machine a few inches forward to access. Oh, DH cut out a hole in the side of the tray to accommodate the knee lifter. Both ends are open so any pins or little tools that drop onto it are easily retrieved.
You can see the 4 screws attaching it to the underside of the desk top.[ATTACH=CONFIG]583775[/ATTACH][ATTACH=CONFIG]583774[/ATTACH][ATTACH=CONFIG]583773[/ATTACH]