Before putting a temp controlled area, for years, my wines were fermented, cleared, barrel and carboy aged, bottled and stored at room temperatures, 70 F - 75 F. If you can maintain your wine at these temps during fermentation, you'll have a good part of the battle under control. White wines would like to be cooler during fermentation, as it helps preserve flavor and aromas, but it's not a deal breaker. There are some inexpensive techniques to keep temps down, water baths, wet towels, frozen milk jugs in water baths, etc. to lower temps. If you have trouble keeping temps up, brew belts are an easy solution.
Though these temps aren't ideal for aging in barrels, carboys, or bottles, didn't ever create any noticeable issues for my wines. For me, the first step towards temp control was a wine fridge to store bottles, followed by a full blown wine room.