Patched fonts are often incomplete. You might find that ligatures, punctuation, or specific character variants do not work, ruining your design.
Some font foundries offer limited free trials or demo versions of their fonts. While KS Roam Regular does not appear to have a widely available demo, checking with Kreuk Type Foundry directly may reveal trial options.
If you need a similar aesthetic to KS Roam Regular but do not have the budget for a commercial license, consider using high-quality, open-source alternatives available for free commercial use on platforms like Google Fonts: