As a first-time buyer who can afford a bigger house, is it a bad idea to buy a one-bedroom condo to keep costs and space small?

A one-bedroom condo can be a perfectly reasonable first buy; the tradeoff is resale liquidity, so your near-term life plans decide it. Your agent's caution has a real basis. Fewer buyers shop for one-bedroom units, so when you go to sell, the unit can sit longer and draw a thinner pool of offers than a two-bedroom in the same building. The concern is liquidity at resale more than appreciation. So run the timeline test. If marriage, kids, or needing more space are likely within a few years, you could end up trying to sell the hardest-to-sell layout right when you want out. If you genuinely want to keep costs and footprint small, and you're comfortable holding the unit or renting it out rather than selling on someone else's schedule, a one-bedroom that fits your life is a sound buy. We frame it the same way we frame a home backing a busy street: plenty of buyers are fine with it, just go in clear-eyed that a slice of future buyers won't be, which can mean more time on market later. The call belongs to you, and your agent's job is to inform it. Buy the space that fits how you actually plan to live, with the resale tradeoff in full view.