and funding secured for AT LEAST the next 5 years
That's one that'll catch everyones eye.
Does that include office rental, utilities, staff salaries, advertising, stationary, sundries...
Or is it enough to cover a small reseller that you can oversell for that amount of time?
Not being harsh, but in 5 years with funds you should be able to expand quite a bit and have you calculated for expansion?
There's also the old question - do you intend to be interested in it in 5 years once you find out it's a lot of hard work and not as much fun as it seemed at first?
All those and 1,000's more
But more in answer for advice, don't try and take on the 'big boys' just yet, provide a quality, reliable service with top notch support and spend
a lot of time advertising and promoting but don't sell too low (lose a client that won't pay your required price rather than stock up on freeloaders). Don't fall for the 'for $1000 we guarentee a top 10 on google' (you can buy that in adwords) offers from others. Work hard, don't overreach and good luck