The to in English marks an infinitive, which is often used as a verb complement:
I plan to eat a burger.
Another way of expressing the same relationship (that your intention is to eat someting) would be
I plan eating a burger.
(That sounds a bit odd to me, though, as plan would probably be used more often with a to-infinitive rather than an ing-clause). This almost sounds to me like me planning while I am eating.
If your intention is not just to eat, but to go somewhere to eat, you say
I plan to go (out) to eat a burger.
You can add some modality, and say
I would plan to go to eat a burger (if I had the time to do the planning).
Basically you're adding more features to your verb group.
The question now is, what do you want to express, and then you need to think about how to do that. You seem to be coming from the other direction, trying to replicate the form/structure and not the function of English verb constructions.
I would think of what you want to say:
- semantic content: this is done by choosing a particular verb (eat, go, plan)
- pragmatics: be judgemental/evaluative (talk/chat/gossip/converse/...)
- modality: how likely is it? Do I have to do it? Am I abble to do it? In English you use modal verbs for that (can, would, should, must)
- tense: when does it happen? Past, future, present? This is done by modals (will) or morphology (planned, ate, went)
- link with subject/object: for redundancy, do you want to have shared features between the subject or object and the verb? I eat, but she eats. You could be inventive and have the verb agree with the object (*I eat a burger, *I eats two burgers)
You don't need to express any of this (apart from the semantic aspect) through the verb. You could have separate words that signal any of these, or use word order: if the verb is before the noun, then it means you disapprove of what happened, if it is after, you're fine with it (that would be an odd example, but hey, it's your language and you can do what you want to).
Or you could have affixes that you attach to the words (which is like regular past tense markers in English).
Some verbs (and nouns) take complements, eg anything related to planning/thinking. Or other verbs that relate to actions: I'm waiting to start, or I'm waiting for Godot to arrive. So for longer verb groups you're probably looking at having such verbs at the beginning.
So the length of verb groups really depends on what you want to put into it.