DIY (or minimal professional help) Mini Split Installation: Brands/Types... Advice wanted

Want to install a mini split in my garage kitchen area. This room is about 400SF and it's attached to my garage via French doors. I want to install a 24k btu unit to cool that room (lots of windows/west facing) and also be able to open the French doors and knock down the garage temp as well if needed for a party or holiday gathering. I thought about a multi zone but don't know if paying that money is worth it for 2-3x/year we may or may not need it.

I want to do this as DIY as possible but have a neighbor that's a retired HVAC guy that can assist with any particular things like vacuuming the system down and charging it if i don't go with pre-charged lines.

I would like to install one with a ceiling cassette type indoor unit but am open to the wall mounted type as well. Plenty of room in the attic in this area to work above. I also have a 240v circuit in the area that i will be tying to so that helps...

There seems to be a lot of brands these days and prices vary a lot.

Pioneer
Mr Cool
Senville
Blue Ridge
Bosch
Della

I don't need the top of the line, just something that will work

Thoughts/tips/snarky comments welcomed here...