There are a lot of factors affecting longevity of an edge: the quality of the steel, the quality of the honing, your stropping technique, and the toughness of your beard. If you were able to keep a Dovo going for a long time, it must have good steel and your stropping technique is probably good.

You did not specify the nature of your cheap blades. Some cheap blades (for example, Gold Dollar), can be be made shave read; but the steel is not particularly hard, so the edge may not last long.

Other cheap blades are often called razor shaped objects because they are not suitable for shaving.

Some vintage blades are cheap, but can be turned into decent razors if you have the skill to restore it. Some vintage razors have deteriorated steel at the edge. I have had to resort to the use of a 400 grit hone to remove bad steel from the edge of a vintage blade to get to good steel underneath. Then I set the bevel at 1K and went through my normal synthetic progression and finished on a natural finisher. It now holds a nice edge.

If you provide additional detail on your blades, the forum members can be more helpful.