Rather than a crate, how about an X-Pen, indoors? I got this idea from Ian Dunbar’s books: Before you get your puppy/after you get your puppy.
https://www.dogstardaily.com/files/BEFORE%20You%20Get%20Your%20Puppy.pdf
https://www.dogstardaily.com/files/downloads/AFTER_You_Get_Your_Puppy.pdf
My current puppy, who will be a year old in August:
I disassembled my dining room, because it has a hard easy to clean floor. I attached an X-Pen to the wall, to provide a decent sized area for the puppy, so he was not confined to a small crate and could move around. I bought a crate pan (plastic pan), put some grass sod down in it for a potty area and taped down puppy pee pads under it, so that they extended around the edges for ‘near misses’ of the sod. We hired a dog walker to come mid-day for a half hour walk. Puppy also gets a good half hour walk most mornings. And another in the evenings. Some obedience/agility classes rounded out the exercise and mental stimulation for the week.
This is what the puppy pen looked like on day one, we later updated it with pee pads under the sod, and took out the crate:
https://scontent.xx.fbcdn.net/v/t1.0-9/15036166_1266759923365843_134252266329376566_n.jpg?oh=3b6c397b8311c91dee5d7024f49080bc&oe=59E5E1AD
There is a bed, lots of toys and chews. We used this set up until about a month ago, and have been slowly dismantling it in the last several weeks. This week we removed the pee pads, the sod has been gone for a while. Now my 10 month old puppy has the entire kitchen/dining/bathroom area (all hard floors), and we pick up the kitchen counters, bathroom trash and other items before leaving the house. There are baby gates to keep him out of the living room and bedroom hallway. The older dog can interact with him if she wants to. She can jump any gate like a gazelle, so confining her doesn’t work really. The cat can also get away from him, or interact with him if she wants to.
Ultimately, the goal is for him to be loose in the house, with the cat, and with the other dog. But its a long road to get there.