mango, I have a similar issue with time, I've got 3 DCs, the girls are 7 and 5 so don't nap, and the 12 month old is an anti-napper! So I either eat early (5.30) or late (8pm) and do the aerobics at 7.30 when they are all in bed.
matilda if you can get cheap 0.8- 1.2 kilo weights from a charity shop or carboot/ebay they will do fine, my SIL used cans of baked beans, though weights are a bit more comfortable. If you have a TK macx nearby they usually have small weights for about a fiver.
Day 1 completed! Ooh, I ache. Really hoping this doesnt set off an old back niggle, I had left sided backache last year and it hampered my exercising in a most annoying fashion.