I want to add a cautionary note to the first reply above. With some roses, the vigorous basal shoots are very brittle and fragile. You can easily break them if you try to bend them at all. Usually these have a glassy look. Wait until they are fibrous and bend them then, but before they get too stiff and old. Usually you can wait until a climber basal grows out to its full length, 8' or so. Usually a climber will not be strong enough to produce these long canes until six months in the ground or more. It will make shrubby growth and bloom. These small canes will not turn into climbing canes. They will be bypassed. So usually, no training is needed. The shrubby growth canl be useful in hiding the climber's legs.

There is some misinformation in this article. For one thing, once-blooming roses while they bloom on year-old wood do NOT set flower buds by fall the way rhododendrons do. The article implies they do: "After all, if you pruned them in early spring, you'd cut off all the flower buds." Well, I prune and train my once-blooming old roses and ramblers in fall or late winter/early spring. They bloom on laterals produced on the old wood canes. They do not start producing flowering buds until after the forsythia bloom. The most important thing about training ramblers which this article doesn't even mention is to train them horizontally to encourage blooming laterals all along the canes. The reason for using fences or trellises or other structures is to encourage the horizontal growth. About 1/3 of my roses are once-bloomers and I have a lot of climbers/rambers including this one on the arbor below, 'Debutante'.

You only cut the laterals. I cut them down to the second leaf set, For a climber, less is more. you want to get the most flowers.

I had five Lady Banks along a fifty foot fence in San Diego some years ago. Really more than was needed for that site, little did I know. It's an easy Rose, and no prickles! Yes, once blooming, but such a spectular sight. And, lovely greenery the remainder of the year. I hope yours comes around now that you have cleared the way. Looking forward to future pics.