You won't necessarily need a heated chamber, depending on your materials choice, as an enclosure tends to warm things up for many of the filament types. Consider to read up on your possible filament selections to see if heated chamber is referenced or simply enclosed. Some of the higher tech stuff would need active heating, but that also brings a concern regarding the electronics within.

There are a few homespun enclosures for Prusa and clones that are not heated and even for those the owners will move the power supply and control board outside of the enclosure to better ensure a longer life.

If you're considering to build from a kit, you can make allowances during the build. Of course, another advantage of building from a kit is you gain a tremendous understanding of the mechanicals for future troubleshooting. The Prusa MK2 we built for the library makerspace was great fun and despite the tremendous understanding gained, there have been zero problem requiring troubleshooting. One would hope you'll enjoy a similar experience.