The backyard option is only feasible if you live somewhere without light pollution and clear skies, which is not most people.

$600/month is a reasonable deal if comparing it to driving couple of times a month to a dark sky location near you.

While it is fun and rewarding to be camping and hiking like that, the effort gets in the way of serious amateur astronomy.

Amateur astronomy is one of the few hobby science fields left where real contributions can be made and published without being a professional astronomer.

It really depends what your goals/targets are. You can still do a lot with narrowband filters that make light pollution a minimal concern.

One of my favorite images was taken from a resort balcony with my telescope directly under a fluorescent light (pretty bright, probably a 75W equivalent) with plenty of other lights along the building and sidewalk below. I used an Optolong L-eXtreme filter.

I always show people the picture of the telescope setup first (which includes a fully-lit cruise ship passing in the background), get the, “Why did you even bother bringing a telescope to Aruba if there wasn’t anywhere good to use it?” reaction, then show my final image of the Lagoon nebula.

At home it’s not as bad, but there’s still a streetlight about 50 meters away, plus the neighbors’ deck lights…yet I don’t need to care about that at all.

Bonus, not fumbling around in almost complete darkness makes things so much easier when setting up and breaking down the gear.

you can't not link to your photograph of the lagoon nebula after all that :)