I actually have a smaller soft crate that fit on a square coffee table perfectly that was in front of that window. The peas grew so big so fast that I end up having the hubby cut some plywood so I could place the pictured larger soft crate on the table in front of that same window. Worked out well, but I still gave them extra light bulb light during the day. Heat is from only the heat plates (all inexpensive on Amazon, and have worked well for warming all my little chicks).The soft sided pen make so much more sense. I never thought of it and if I saw photos I probably didn't need one so the idea didn't land. I ordered one last night and it will come well before the chicks. I Hope it has a semi-solid bottom so I can just pick it up and take them out for some sun.
I haven't hatched chicks since only I want females but it must be so rewarding. When you put them in the bin for the first few days they don't get light other than the lamp? How many days? Do you have any pets at home?
The bottom of the soft crate is nylon fabric so once set up, would be more difficult to move in&out with chicks inside without taking heavier items out first. Though…you could put your own 1/4” plywood or cardboard base inside to make it stiffer and easier to move…
For chicken chicks we went straight from this crate to an outside pen at 6 weeks (made of just dog kenneling panels and large hard dog crate for nights) where they were protected but still able to see and interact with the existing flock until fully integrated at 3 months. I only have had a few chicks at a time, nothing large scale. We found the large hard dog crate out for large trash by a neighbor…once we were done with it, put it on the curb and someone else took it before it was picked up by large trash. If only that dog crate could speak of all it has done!

We do have 3 dogs and 2 cats. Nowadays, they don’t care and don’t bother indoor chicks. However, in the past I did place the dog kenneling panels around the soft crate to keep the dogs away (mostly keeping the chihuahua from marking it). We have had rescue parrots for so long, our other pets are accustomed to birds. I’ve attached a pic of the dog kennel panels. These are so useful for all types of pets.
Good luck!