Pay a visit to VT state parks. Every one I’ve been to has them. During my 2021 tour in the state, I didn’t pitch my tent on the ground until the final night on the road, when I stayed at a city park. They come in handy when it rains.

I thought the OP was moving to TX for work.

A good option if security is not a problem, you're not in a really humid enviroment, and expecting to only store one or 2 bikes in the $65 size - I would opt for the larger $99 size.
As for humdity, depending on the fabric, a full floor and zipper door enclosure would get you thru infrequent rain - like in the Southwest, Ca, Tx...
Not sure I would use something like that in Fl, Miss, AL, Ga, etc... but then, I haven't lived in a truly humid climate in a long time. We have a lot of very frequent marine layer around here which gives 70-80% humidity daily/nightly, but that mostly burns off and then gives bright sunshine.
Depending on how much direct sun your spot will have, will determine the longevity - out here I would give it a 2 yr life span, maybe 3 in a shady spot....
... certainly would be worth a try, at the listed price...
Ride On
Yuri

Those things just look like a moisture holder and rust will be your result. I store my bikes in my garage, I live in Florida and I run a fairly heafty fan, to keep the air moving. In the summer, the humidity and temp in my garage are 70 to 100% with temps during the day over 110 and at night, in the 80's. I would never store them outside in something like that. Now you could be in the desert SW and humidity is not a problem where those might work, but I would go with some more substantially built, and have the ability for some air movement.

N-1 cars

Extra credit for the team creating the ad, those AI bikes look extra special with their extra handle bars and seatposts extending from saddles. Or just copy/pasted images of flat bikes, I'm sure one could store hundreds of copies of poster board bikes in these tents.

The photo of the bikes is truly bizarre — three saddles on two frames, bottles melted into the down tubes — it looks like they came out of the Philadelphia Experiment.

That product is basically where you send your bikes to die a slow, rusty death. It's a time-out tent for bikes. Then again, it might be a good touring/bikepacking tent if it would pack down small enough?

When a daughter moved to Portland she had one similar to what Amazon shows in her fenced back yard with good results for almost a year. Was happy to get a shed built as it was getting to be pain to zip which she had to do twice a day and often as she would bike to work as often as possible. For double or triple that amount Amazon will send you a shed.

Why not hang them from the ceiling in the garage on hooks? If the ceiling is low, hang them over the hoods of the cars.

Honestly? Not a fan

I second hang them from the rafters.

That's not a lean-to, that's a quonset tent.

Bike theft from backyards is common in Seattle, those strung-out on fentanyl will steal anything and trade for a few bucks at open-air markets with shoplifted liquor.

Bike hoists are now cheap and a good option if the garage ceiling is high enough. Garage door needs to stay closed, thieves will grab from an open garage.

Any rigid shed would need to have walls that cannot be cut easy with tin snips or kicked in, and a door that cannot be pried open with a prybar. Hard points for locking each bike to, would be a plus.

At this point, I don't think OP is actually looking for effective solutions to any of the topics he brings up.