if you can't leave your house and don't have access to equipment, do you have stairs? Might be boring as all hell, but you certainly can walk up and down them for 30 minutes. How old are your kids? Mine is 3 years old and I throw him in the Bob and go for a 2 mile walk every day/other day with my wife.
Jumping rope is not easy conditioning, it's convenient conditioning. Do 100x5 before each workout or the NOV jump rope routine in the 2nd edition.
You could also progress on the rope on off days - start off slow, progress slowly. Sound familiar? Also, since this is 'easy' conditioning, don't go for reps, just nice and easy jump rope; quality over quantity, i.e. no missed revolutions.
Week 1 - 3 sets of 5 minutes
Week 2 - 3 sets of 6 minutes
Week 3 - 3 sets of 7 minutes
Work up to 3 sets of 10 minutes, giving yourself 2-3 minutes of rest between each "set."
Once you're up to 30 minutes (3 sets of 10 minutes), begin to shorten the rest periods.
3 sets of 10 minutes with 3:00 minutes rest between sets week 1
3 sets of 10 minutes with 2:45 minutes rest between sets week 2
3 sets of 10 minutes with 2:30 minutes rest between sets week 3
Eventually you'll get yourself in the condition to jump rope for a straight 30 minutes.
Start slow, progress slowing, hit PRs!