I always recommend customers get enterprise grade mw ovens. The seals are stronger and dont leak as much. The walmart mw, for example, arent made to be opened and closed 30x times a day and seals become worn very quickly. You can do a quick google search and fine a number of enter kitchen warehouses that sell these types of mws.
I might also recommend getting the lowest watt mw possible. No need to get a 1000 watt if it isnt needed.
I hope this helps.
"Satisfaction does not come from knowing the solution, it comes from knowing why." - Rosalind Franklin