Everyone has their own level of comfort in regards to spending. We have a 2nd home at a lake, which is really not necessary from a mustachian point of view, but we spend time on weekends there as a family retreat. It didn't cost us a whole lot and it has been fully paid off for years. Some of our best memories have taken place there.
We like to travel a lot, but try to do it as cheaply as possible. We don't spend money on clothes, new cars, new furniture, fancy food etc. I think mustachianism is spending money on the things that make you happy, and cutting back on the things that don't.
We didn't retire very early. But, we did save 20% of our income along the way. Also, we both spent the last few years only working part-time. Our stache is not huge by some standards, but SS., rental income, small pensions and income from a business covers our everyday expenses. Our stache is more for extras like travel and home repairs and maintenance.
If you don't think you will need a large 'stache and wish to live more frugally, than go for it. We are all on a different path in life and value different things, but the core principles are the same; don't spend more than you make and save as much as you can for retirement.
Miss Prim