It is very rare to ever get a green card from E2. It does not lead there and you have to change status to something else. We have heard of ways and means with smoke and mirrors with the help of laterally thinking talented attorneys. But the norm is NO. You do have to keep the business trading. If you stopped trading one business but replaced it with one at least as successful and fulfilling the E2 rules, you may be OK but ask an attorneys opinion. You could go 50% each with a family member on E2. Total investment should be around $100,000. You would not be allowed to accompany an E2 holder as a dependant must be a spouse or child not a parent. The best you could do if you wanted to do that would be 6 months on a B2.
Seminole. the price of housing is prohibitive in the UK. We couldnt afford to keep a base in the UK and one in US and keep moving between the two because of the cost of keeping two homes going. plus prsumably not working in either place as it would be hard to work with that scenario. But I agree about if being ideal if you have plenty of money.