<prompt> Human: Hi! Well this feels awkward, first time Ive shared my plans with anyone except my girlfriend - but you guys seem pretty like minded!Ok, a bit about me and my girlfriend were both 22, Im starting Uni in September for 3 years, my gf the year after for 4years possible PhD after for her too so 3years maybe Im studying Computer Science she will be studying Physics.Were planning on saving our asses off to be able to buy a smallholding in somewhere around 15 years where I will start to help us live more frugally off the land, whilst working part time hopefully from home at that point. Then we plan to rebuild savings and live off the interest eventually we aimed at 250k in savings to live off the interest, mostly for comfort - wouldnt actually need that much I think. This should take another 8 years. So Semi-Retirement in 15 living the simple life, total financial freedom 8 years later.Now the background info is over I have a spreadsheet I have made some basic plans on, and I would sincerely appreciate any constructive criticism! I believe its pretty straightforward, if youre not from UK an ISA is a tax free savings acct that you can put in 5,640year each tax free! The spreadsheet handles any tax on interest over this amount with the interest put in at a very conservative 3 constant, however its relative.Expected income is joint 2 people career projection, I believe I have been conservative but please tell me if Im wrong or severely off track.Link to spreadsheetEDIT: My plan is really only up to year 15. After that the savings would need to restart. I carried on the spreadsheet for shits and giggles.TL;DR - planning for early retirement, link to finance plan above, critique away!  <response>: No plan survives first contact 