Sounds like you're being a realist to me. Nice to want to view whenever you can even under adverse conditions. I'm not sure how the Mak will perform under those conditions not using one myself but I know my 250mm DOB would not work well from a balcony. You seem to have some experience with scopes, your evaluation of your options makes sense to me. I believe aperture rules in LP skies so the 150 Mak would have an advantage over most (affordable) refractors.
And it's portable so anytime you do manage to take it away it's big enough to see something worthwhile.
Good luck with whatever you decide, we'll expect a first light report.
