#14 Don't think so even staying more than 180 days would require taxation on Worldwide earning basis. The British are not so stupid to offer free stay for nothing. In return, minimal welfare, free secondary school.

So, kind of chick rib, leave only when it's a matter of life and death. Foreseeable high unemployment rate due to pandemic. There are pros and cons, no need to be so grateful at such early stage. If you sell the house after application (very likely), the asset can be taxed. Other document endorsement fees are not low, in terms of tens of thousands each, sounds like grabbing money. But no need to renew BNO.

Watch this first to grasp some ideas before going for something sophisticated.