We are considering getting an additional vehicle. Our current vehicles are a 2005 Chrysler T&C minivan (purchased used for $7000, now has 120K miles on it) and a 1960 Ford F-100 pickup. I bike commute 90% of the time (13 miles total per day), so the poor mileage of the F-100 doesn't affect our spending much. I have been driving this F-100 for over 20 years, so it has quite a bit of sentimental value as well. I do all my own maintenance, and it requires very little at this point. My wife homeschools our 3 (almost 4) kids, so uses the minivan to take them to weekly homeschool meetups, Cub Scouts, church, etc.
I have an additional Ford F-100 that I purchased for parts. My plan is to take the cab from this parts pickup and use it to replace the cab on my 'good' pickup, which is severely rusted out. This process will take several months (hopefully no longer!) so we will need another vehicle for the few occasions (1-2 times per week) that we are driving in different directions for activities.
I'm considering buying a used Mazda Miata for $2000-$3000. We have the cash, it is currently in a savings account labeled Car Savings, which was intended for an eventual minivan replacement. I'm confident I could get the money back out of the Miata once my pickup repairs are completed, would just have to be careful that we don't expand to a 3 car household after the pickup project is completed. I test drove one last night, and it put a VERY big smile on my face. I used our simple FIRE calculator to see the impact of putting that money into the 'stache now, and it moved our FIRE date less than one month.
How anti-mustachian would this purchase be?