Woooooo there cowboy, dog post without photo. I’ve reported you, for shame, for shame!
What ever way you train it, you will have shit and piss for a while, sorry.
Reward training is the way we went. Didn’t have a large enough kitchen to accommodate a crate but it never went on it’s bed so never an issue.
Lots of news paper down. When ever it piddled either inside or out we said ‘piddle’. If it ever pissed on the paper inside or went outside it got rewarded. Over a few months the amount of paper reduces to a single sheet inside. Still plenty of praise and treats when it goes outside or on the paper and continue to use the ‘piddle’ phrase when ever it goes. It will link the ‘piddle’command to treats/going outside.
Finally remove paper.