dynamically import files from a folder WITHOUT combining them

Disclaimer: I'm new to both Power BI and R (only a couple months into learning both). 

I wrote an R script that dynamically generates dataframes for each file of a specified file type from a specified folder and then saves those dataframes to an R environment '.RData' file.  Then, in Power BI Desktop, I use R Script as a datasource and use 'load("filename.RData") to load the dataframes from that environment without running the entire underlying script that generated those dataframes -- which gives me control over 'refresh' (manually accomplished in R) and saves processing time in Power BI.  When an R script is used as a data source, it pulls compatible R objects (dataframes, matrices, lists) into Power BI as separate queries/data sources.  This is what I wanted to achieve.  However, there seems to be a limit to the number of R objects Power BI can load into a Desktop session.   I can't load all ~120 dataframes, so now I'm using trial and error to find my limit for successful dataframe loading.  Regardless, there does seem to be a limit, but I'm not sure if the limit is due to an internal Power BI constraint (number of objects and/or the size of the objects), or due to my own system constraints (RAM, etc).