That is all very sound advice IMHO.

I'm retired now, but owned & operated a small retail biz for 10 years.
Just remember the old adage "No business plans to fail - they fail to plan"
Take heed from what our members have said, do your research, do the numbers, develop a business plan, raise the seed capital, get totally committed then implement YOUR imagination.
And most importantly, remeber to offer all of us a free pizza & games!

Best of luck

PP