Small cage on time of bonding?

If i bring another rabbit to home, can i place this rabbit in temporary cage L 37" W 22" H 18" ? And than do something bigger for two bonded rabbits? The rabbits have access to two roms in my house.

Is the C&C cage measuring L 55'' W 35'' H 28'' with second floor from shelves enough for two rabbits?

Personally that sounds a little small to me, Will they get plenty of free range time? a small cage will prevent the rabbit from fully stretching & may result in muscle wastage x

They will have free range time all time when i am at home, so about 5-6 h a day when i work. I dont want to buy bigger cage, because after bonding i will do new, bigger CC cage, so... But in another way i know then bonding can take a more time, so if it will be longer than 2-3 weeks then i will buy bigger cage, it will be must.