Nope. You cannot really sponsor yourself working for you own company, that would be such an obvious loophole.
I've been living here 3.5 years, 2 on a YM visa, 1.5 on a work visa. Unfortunately, my 2 years on YM don't even count towards the 5 required to get ILR. You can build up an entire life here & all it takes is for your work visa to be disappeared and then you have 1 month notice to gtfo the country otherwise you're "overstaying".
After 3.5 years somewhere you definitely build up "a life" there, but the UK gov offers no protections at all. Until you hit that 5 year mark they don't give a toss about you.
I've been living here 3.5 years, 2 on a YM visa, 1.5 on a work visa. Unfortunately, my 2 years on YM don't even count towards the 5 required to get ILR. You can build up an entire life here & all it takes is for your work visa to be disappeared and then you have 1 month notice to gtfo the country otherwise you're "overstaying".
After 3.5 years somewhere you definitely build up "a life" there, but the UK gov offers no protections at all. Until you hit that 5 year mark they don't give a toss about you.