I'd agree a 10" SCT needs the EQ6 class mount, is your location suitable to install one or more piers anywhere? Can you claim a permanent 1 foot diameter fixture in your front or backyard? If so it makes alignment a bit easier, you could buy a very small shed that rolls off and minise your carrying duties.
Alignment you will master, even with restricted sky views. An illuminated reticle or a webcam into PHD helps to measure DEC drift!
Finally with light pollution a factor I'd keep the 10" whilst you can manage it, but I'd be trying some way to permanently mount it!
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