Ok, so without removing any small parks or current lots, here is a list of EA/UC rabbithole lots that you can fit into MF. I've tried to find lots that are a standard size so that they don't look silly when placed in the middle of a bigger lot, but obviously there could be other choices if you don't mind them swimming around in bigger lots. Remember that unless you have permission, you need to place them before you start. This leaves you with 1 40x40 lot left, which you could either move into or place another lot on, like a bar, and then place your own, much smaller lot to live on (since the rules say you can place an empty lot if your town doesn't have one). I hope people find this list helpful
School - Par Excellence 30x40 (townlife) - place on an empty 40x40 lot
Townhall - Hidden Springs - place on empty 64x64 lot - you could use any really, but this one takes up the whole lot and doesn't look silly
Military - Riverview 44x44/Twinbrook 44x44 - place on 50x50 lot
Police - Sunset Valley/Riverview 30x30
Business - Barnacle Bay 40x40 or Hidden Springs 40x30 (though both look a bit funny because one is meant to have road around 3 sides, and the other doesn't go right to the edge of the lot)
Bistro - Riverview 20x25
Grocery - Riverview 20x25
Spa - Twinbrook - remove a 40x40 empty lot and replace with a 40x20 lot and it will go to the edge of the lot
Diner - Union Cove - 30x30
Bookstore - Riverview 20x25
Theatre - Hidden Springs 25x35
Criminal - Hidden Springs 30x30
Science - Lucky Palms 40x40
Hospital - Hidden Springs 50x50 - on the empty 50x50 lot
Stadium - any - Empty 64x64 lot
Film Studio - Union Cove 50x50
There are limited places to put extra empty lots but I have found space for everything here. All lots are snapped to the road, except one 50x50 lot. You can fit that on the 'baseball pitch' opposite the school if you don't mind it not having road access. None of the lots I've placed overlap any spawners (I checked in CAW). If you place a lot on the 50x50 lot on the baseball pitch, I'd recommend one that covers up the terrain paint. The Riverview Military base is a good choice.
Extra lots
30x30
- opposite Fae Rae Gardens
- opposite 71 N Falls Ave (near Gypsy Wagon)
- opposite the vampire lounge
20x25
- opposite Varg's Tavern
- on Wood St around the corner from the equestrian centre
25x35
- opposite the art gallery
20x40
- delete any 40x40 (except the one on Wood St) and replace it with a 40x20
50x50
- on the baseball pitch
- Delete the 40x40 lot on Wood Street, and replace it with a 50x50 lot
Here are some pictures to help with placement - If you put the lots elsewhere you risk overlapping a spawner. I'm not sure if the game deletes the spawners like it does the trees, but you don't want them to be inaccessible if it doesn't.