Thanks for your question. I will try to help.
I assume that you are both non-UK, non-eea citizens.
This means that you would have to show that you will invest £200, 000 gbp in the business in the UK which you will operate and run, employing the staff that you refer to.This is part of the eligibility criteria in order to apply for a Tier 1 entrepreneur visa. The webpage on this type of visas is here:
The application is quite complicated in terms of the evidence of both of you and the business that you will set up/run/invest in, so I would strongly recommend that you instruct a UK based solicitor to act on your behalf, check your business set up, draft the application and check your supporting evidence.
This type of visa leads to indefinite leave to remain after you have been in the UK on it for 5 years. It can lead to ILR after three years occasionally where the business has been very successful and you have employed a number of staff.
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You would have to make the application from outside the UK. If you proposed to apply for a visit visa then you would not be allowed to carry out any business activities and would have to leave the UK before the expiry of the 6 months visit visa.
The tier 1 visa would be granted for between 24 months to 3 years and 4 months to allow you time to set up your business and get it up and running.
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You can use the following find a solicitor site to get search results of immigration solicitors:
You're welcome. Good luck.