OK, I am prejudiced... I LOVE Meyer
lemons, aka Valley lemons. Love to eat them raw, like candy <3.
We have ours in the ground.
But if you live in a climate where they will more than likely freeze in the winter, having them in a large pot that you can bring inside in the winter will be preferable. Bu t keep in mind the weight you will be dealing with. Also think about the space where it will be placed.
They enjoy a cool, but not freezing, climate in winter, which is when they begin the bloom cycle, and plenty of sunlight.
If you jostle it around a lot while moving in & out, you will have much blossom drop.
Meyers are quite hardy. Ours are in the ground
outside, in a sunny, south-exposed spot, protected from the wind and in a warm micro-climate.
They survived the past two horrid winters, but
just barely.
Good luck with yours.