My new UPS Store mail address includes forwarding services, etc. My bank accounts already include online access and bill paying. Most of my recurring bills allow online payment either directly through their site or through the bank online, or offer pay by phone by debit / credit card.
I have yet to check out the truck stop options; I heard some membership options are available to save a few bucks.
Right now I am considering a strategy of day use at inexpensive parks [restrooms, showers, topping off water, and rv-style dump stations], plus free rest areas [restrooms, showers, topping off water, sleeping], plus boondocking [free dry camping, sleeping], plus night-shift jobs [legit parking at night with in-vehicle sleeping during the day which is apparently less-hassled].
I am resurrecting my old laptop for on-the-road use, but I fear it may need to be replaced.