Should I get a crib-mattress toddler bed or a twin floor bed?

Crib-mattress toddler beds (Dream On Me Classic, Delta Canton, Austin Day Bed) are the cheapest path and reuse the mattress you already own, but kids outgrow them by 4 to 5. Twin-size Montessori floor beds cost more upfront but verified-purchase reviewers and specialist subreddits note they last well into the elementary years.