After a few years on Utah's salty winter roads and salty desert environs... I can promise you weld-on sliders can come of faster with a sawzall than fighting a bunch of bolts

I had my sliders re-powdercoated after 3 years of abuse, took me literally 5 minutes to have them off, a clean flush cut right against my scab plates using a sawzall. Powder-coated them, prepped the end of each with the flapwheel, flapwheeled the frame mounts and they were back on in an hour, about the same time it takes to mount and align bolt-on. Pick your poison.
There is a vast variance with some of the bolt-on sliders, some are plenty robust (Slee's bolt on for example) and others are weak at best, relying on attachments at the body to keep the sliders from tweaking. You pay for what you get and the same goes for building your own, the extra time spent building a braced bracket versus a flat plate with a couple holes at the end of each kicker will be worth it in the end.