You would have to be careful to avoid sacrificing too much HP to increase the spell's AoE, but yes, it's possible. Not something I would advise, though, since there are better spells for killing large groups of enemies rather than trying to Disintegrate those on the periphery of the effect, and any you bring with you to your new destination still need to be dealt with. If we could use it, then immediately cast Celerity to escape, that should work.
I'm more interested in the transport possibilities. With some specific buffing, Viserys could get his overall caster level up to 28 when casting Wyrmfold. A 28 foot radius is nice enough, but let's burn 160 HP to push that to a 60 foot radius. Before we cast the spell, though, we would have used Ancestral Awakening to learn Sudden Widen. Used in conjunction with Wyrmfold, that would transport a 120ft radius sphere. Such a sphere would have a volume of 7,238,229 cubic feet.
Imagine if we did a bit of prep work using Titan's Tools and other magic available to use to build spherical underground enclosures, sheathed in Hardened lead and steel around a core of fused basalt. A space that large could accommodate all sorts of stuff; barracks, storage facilities, training halls, an immense magical anti-gravity propulsion system/artifical gravity device, etc. And then once it's ready, Viserys takes up position in the center of the sphere and Wyrmfolds it into a predetermined location in outer space.
Space stations, ya'll. Easy to build in the comforts of a terrestrial environment and just as easily lifted into orbit or beyond.
Or just immense KKV rocks we can drop on suitable enemies, such as the Bloodstone Emperor.