I built a business travel app a couple of years back. I think budget filter is not enough to create enough value as most people set a budget for entire trip an

I built a business travel app a couple of years back. I think budget filter is not enough to create enough value as most people set a budget for entire trip and not just travel. If you could crowd source data of avg expense for taxi, and stuff then this could get really interesting. In our case we could map project budget for travel to trips using historical data(not so accurate but good for ballpark)