Obstacles are the market. Somebody searching how to get a mortgage while self-employed has usually already been refused or discouraged, which makes them the most motivated enquiry a broker receives.
Remortgage searches happen on a schedule. Fixed periods end continuously, and the person searching has a date and a fortnight to decide, which is the shortest and most reliable path from search to instruction.
First-time buyers search long before they buy. Deposits, affordability and what a lender actually looks at are read months ahead, and the broker who answered those questions is the one contacted when the offer goes in.
Property type is a niche almost nobody covers. Flats above shops, timber frame, listed buildings and anything with a short lease are declined routinely, and the searches around them are barely contested.