Chillychicken is spot on. OP, there is so much to consider when you are running your own business. DH has his own company and whilst there are lots of benefits for us, it can be really tough.
He works long, long hours, usually including weekends. We are lucky to take enough holidays but it’s not without compromise. Even though DH has a business partner, he will be in phone contact frequently and will respond to all his work emails. I can’t remember us ever taking a holiday without working.
OP, If you don’t have huge funds to start a business and no business partner, it will be just you shouldering the responsibility in the first few years. Without funds it can also be difficult to grow and would take a while for the business to reach a decent level of income. There will be months when you can’t afford to pay yourself. And months when you don’t have enough to even pay the staff. (Our ‘home improvements’ savings went into the company to pay the wages a few months back, not got it all back yet!) Before going into any business with considerable overheads you need to consider where you will get the funds to plug the gaps in your cashflow. Eg Could you afford to pay £5k/10k in to the business at short notice and not get it back for a long while/ever?
Also in relation to cashflow, you need to consider the downtime in your business. In our industry, our clients wind down for about a month over Christmas. No invoicing done = not much money coming in a month later (which also happens to be the month for the VAT payment...it’s a constant juggle).
If you still really want to run a business, as you don't have any experience, maybe do a basic business course first? – learn a bit about bookkeeping, cashflow forecasts, marketing etc. And you really do need to get clued up on HR/Employment issues, H+S, tax, insurances and legal responsibilities if you want to employ staff and have a business which is open to the public. I also second suggestions to get some work experience in the field of business you want to work in.
Other thoughts.....the £5k fee you mentioned...DH is a member of fancy members club and pays less than £1k – for that there are plenty of work areas, lounges, bars, restaurant, free film screenings, exhibitions, talks etc. For £5k I’d expect all of that plus sports facilities, pool, spa, exclusive events...and more.
Good luck with whatever you do, but please don’t rush into any business without a lot more research and planning 