Split Text Into Fixed Length Columns

I have 5 columns with data in each

I want to create a 6th column that looks to the columns on the left with data in ti and concatenates all data in the 5 columns and puts it into one cell in the 6th column however put a space between each break of data so that it can be distinguished which bit of data was in what column previously.

The challenge is the new 6th column can only contain 30 characters - When it exceeds 30 characters then create a 7th column and put the rest of data in the 7th column, again the 7th column can only have 30 characters so if exceeds this then put the remaining characters in a 8th column

There will never be more than a total of 90 characters in the original 5 columns so there will only need to be scope for a maximum of 3 additional columns

So for example

Column A had two words in it that totaled 20 characters (the space between the two words is also counted as a character)
Column B had two words in it that totaled 20 characters (the space between the two words is also counted as a character)
Column C had a word that contained 10 characters
Column D had a word that contained 5 characters
Column E had a word that contained 10 characters

Then the result would be

Column F would only have the data originally held in Column A (because it can't include Column B's data as this would exceed the 30 characters)
Column G would have data that was originally held in column B and column C - with a space between B and C data
Column H would have data that was originally held C, D and E - with a space between C, D and E data

Another point to consider is if in one of the orginal 5 columns had say 3 words in it and lets say the 3rd word is the word that exceeds the 30 character limit, then the whole of the third word is to be carried oved to the next new column, I can't have words cut in hlaf with one half in Column 'F' and the other half in Column 'H' for example.