What species of tree frog and how many of them? Some frogs are more territorial than others and will require a larger enclosure especially when you have several males in a crowded enclosure. Frogs do fight. A more hardy American tree frog will have some differences in care than a more fragile and heat loving tropical tree frog.
I have never had frogs but I know a bit about their care because a fair number of these principals overlap with terrariums and I find them fascinating as animals.
I would check out
Josh's Frogs they really care about what they do and will have everything you need and more. They also sell plants grown without chemicals or fertilizers that will permeate the frogs skin making it sick.
This guy is an absolute legend as far as terrariums and frogs
Now for my tangent.
I have some recommendations as far as equipment.
I would recommend one of these styles of enclosure for a few reasons. HOWEVER! BE AWARE SOME MODELS ARENT ENTIRELY GLASS AND HAVE A MESH SIDE(S). Depending on how hot and humid the rest of the house this may be good or bad. Generally tree frogs need high humidity. Some people find that setting up a plastic barrier over the models with a mesh side and adjusting it as needed is the most versatile option, especially when the seasons change.
https://www.amazon.com/REPTI-ZOO-Chameleon-Terrarium-Background/dp/B0DDSTV45H?ref_=ast_sto_dp&th=1
1. Being arboreal frogs, they will have a stronger inclination to climb towards and descend from the lights heat source to help regulate their temperature. The vertical style is more favorable for them.
2. This style is far easier to clean because the front panel opens outward.
3. The vertical style will save you floor/desk space.
4. More of a warning. The higher the canopy the harder the fall. Do not place hard objects other than a shallow bathing bowl or bark accents/hiding places/plant mounts inside for them to fall on. Also don't place a perch too close to the light, this is where the temperature monitor is useful just to know how far the heat is going.
I would also recommend getting a
Reptile fog machine, and
a pair of sensors for humidity control and temperature, if you only want the humidity sensor and regulator I
have it here and I use this specific model for work and growing culinary mushrooms in my spare time. It's a solid product. Sadly, I have never used the fogger before so I can't speak for its effectiveness or quirks as a product. The fogger I use is no longer in production and honestly, doesn't have the volume you're going to need.
