Use a cell phone as your business line. Sign your kids up for recreational day camp. You can work three or four days on your business, then take one or two days to dedicate quality time to them. Look for enrichment programs such as museums and music camps. Set goals for your business, family and yourself.
Balance is important.
It doesn't do any good to be working at home if your kids get neglected and vice versa. Set up your activities weekly or daily and prioritize. Keep a couple of bags of simple crafts handy that the kids can do themselves. The bags should have everything inside they need to do the craft. Trade watching kids with a neighbor one or two mornings a week.