I completely understand this philosophy, but an attempt at building a two-sided market place is very likely going to require outside investors. This opinion that you need to be profitable from day one has been proven wrong repeatedly and while some 'unicorns' will fail or become less than worth $1bn, their achievements are still very real.
It is 100% OK to want to build a business, but entrepreneurs should be flexible enough to understand when it is appropriate to raise money, or make a product that does not generate profit up front.
For the record, I also attempted to create a two-sided market and I also failed. It was super painful and I hope you move on quickly with some really solid lessons learned.