One alternative is having two fixed locations and moving on winter.
I live there, I know how it is ;)
There is almost no technological nor entrepreneurial growth in the area; although pioneering in diffusion and disruption of internet technology (Tiscali), and although many well-intentioned, huge (and ultimately empty) technological poles graciously built in the area, there is little interest in investing, outside of just grabbing the inviting national/european development grants and then leaving the island.
There is no real service or attraction to speak of. The very few attractions (mainly wooden kiosks at the beach) have been made close down or subject to numerous certification delays for "sonic pollution" in maybe the most frequented beaches in Cagliari proper. Endless diatribes consume most of the land in similar way, even though you'd think this place could otherwise easily top many of the most famous places worldwide.
Sardinia is a dream place if you're a scholar, or like cities full of down-to-earth and warm people; it's a microcosm of influences and it's hard to take even just a few steps outside the most modern places, and not be able to recognize traces of the many cultures that walked that very soil. The tradition is rich, and every few steps you encounter a different dialect or new colorful customs. It's a magical place.
I would get back there in a moment if I could. But it's the epitome of Italian waste. I had been so angry at it, and everyone, but it also seems that the majority of the people really prefer to just soak it up, and then forget about it, or else spreading outside of the city to start the n-th unauthorized small town in the middle of nowhere, which is of course in a bad location that puts a strain on the few available transportation resources (almost entirely buses), with majors that play for power with/against neighboring towns, derailing the plans for highways (the "new" 125 anyone) which however is nothing compared to such jewels as the "A3 Napoli-Reggio Calabria".
Sorry for the impulsive rant but this touched a nerve. I would really, really love to go back to
: I am happy for those. I worked there for some time, and these were nice, big buildings, with a nice internet connection, space for growth, and they were immersed in that classic beautiful bitter-sweet sardinian splat of vegetation. But while they were built for grandeur and all, no-one really came there, then various powers competed in the area, which resulted in this temple being connected to the rest of the world by a small dirt road which floods periodically with almost no public service to speak of.
From an economic standpoint, I couldn't have come to Budapest, for that matter. Finding a well-paying job here would be very difficult. (Not impossible, but difficult.)
If you do want a technical community around you in meatspace, I agree that these sleepier corners of the world are not for you. But they are definitely for me. I'll consider Sardinia. (I know a really nice Sardinian lady in Mayagüez, Puerto Rico - she loves it and hates it simultaneously, just like you.)
We bought a house in Richmond, Indiana (more or less where I'm from) for $8000 - that was actually a mistake because it needed too much work, but the principle was sound.
Now we're looking for foreclosures in reasonable neighborhoods in Puerto Rico, we're probably going to build a house here in Budapest, and maybe we'll find something in Indiana in a few years. If you have modest houses in your places instead of putting all your real estate money into a new garage and a pool, it's totally doable.
A lot of not-so-wealthy people have a house in the North and one in Florida, after all.
In the States, these people are called "snowbirds". They declare permanent residency in some low-tax state state, then migrate to the sun in the winter and the cool in the summer.