I actually bought a one bedroom house over 20 years ago. I listened to the realtor who sold it to me who said it would never appreciate as much as a 2 bedroom house, I couldn't rent out a room if I lost income, etc. etc., then did what felt right.
Today I still have my cute little one bedroom house and I've never regretted my purchase. The house fit my budget, my location requirements, need for privacy and a view, and my sense of funky charm. Over the years I've watched it climb from $83,000 to $175,000, down to $135,000, up to $550,000 and now down to who knows where. But it has always been a source of joy while living in it or great income while renting it out.
Don't always follow the pack and buy what is perceived to be the better investment from the standpoint of having the house with the largest pool of buyers when you want to sell. The important thing to remember is to buy something that fits YOU, now and for as long as you think you'll be in the house.
Best wishes to you in buying that house, one bedroom or two.
Keller Williams Realty, Los Feliz
DRE Lic. #01019403