This is a perfect example of when deliberately taking on technical debt is the smart thing to do. You build the feature the "fast way", deliberately incurring technical debt to get faster feedback on the feature. If the feature doesn't work out, you can remove it quickly. If it does work out, then you can be confident that building it the "right way" is now worth the investment.
Technical debt is just like regular financial debt in that it can be a powerful tool when leveraged correctly.
Doing it the "right" way incur a lot of up-front expense that will be wasted if the feature is rolled back.