It is not too late to train him. Several years ago, I adopted a rescue chi. She was approx. 3 yrs old when I got her, and had apparently never been housebroken. It takes time and patience, but it definitely is possible.
If you are going with the litterbox, I would start the training this summer-the sooner the better. If you have him trained to the litterbox by the time you move into your apartment, he should continue to use it there. He may be a little confused at first due to new surroundings, but he will quickly adapt.
My chi pup Jasmine was easy to train to the potty pad. I watched her very closely, and as soon as she started sniffing around, I'd put her on the pad and say "go potty". Be consistent with this and he will catch on. Reward him for good behavior, and praise profusely. Ignore accidents unless you witness them. If you do witness an accident, just pick him up quickly and put him on the litterbox. Some learn more quickly than others, so be patient. Jasmine now goes potty outside when I am available to take her out, but when I'm gone or at night, she will use her potty pad.
Others on the board may have some other suggestions, but this is what worked for me. Good luck.
If you are going with the litterbox, I would start the training this summer-the sooner the better. If you have him trained to the litterbox by the time you move into your apartment, he should continue to use it there. He may be a little confused at first due to new surroundings, but he will quickly adapt.
My chi pup Jasmine was easy to train to the potty pad. I watched her very closely, and as soon as she started sniffing around, I'd put her on the pad and say "go potty". Be consistent with this and he will catch on. Reward him for good behavior, and praise profusely. Ignore accidents unless you witness them. If you do witness an accident, just pick him up quickly and put him on the litterbox. Some learn more quickly than others, so be patient. Jasmine now goes potty outside when I am available to take her out, but when I'm gone or at night, she will use her potty pad.
Others on the board may have some other suggestions, but this is what worked for me. Good luck.