you can do this without having to spend a fortune on a bike, like anything else there are those that say you gotta have this or that to be able to do it. I had a decent road bike i bought in 1988 that i put thousands of miles on over the years, paid around 300 back then still have it too. I rode everyday, to work, to the gym and for long rides every other day i would ride 25-30 miles in the morning lay in grass at park take a nap and tan then go home and eat. Then ride another 25-30 miles just before dinner, usually same route just start from opposite direction. i lived on top of a foothill so no matter which way i went i always had to work hard on the way back, 1,000 ft elevation gain in 2.5 miles.
I miss having that free time to bike like i did, one of the best exercises on the planet. Great way to keep trim stay with it