What about option 3, raise the whole area with 6" more of good soil and then not be restricted by it? If you want lawn, have a lawn. It looks like you have plenty of slope away from the house and the house looks well above grade. It does not look like a problem.

"They guy thats got two fields with a d box/valve and is going to see how long he goes just cracks me up, you go buddy, it's only gonna cost you thousands in the long run. " once you have wrecked on of the fields it is just that, not suitable for use every again (unless you want to try and dig it out and replace it). Once solids pass into the field (or waste that did not sit in the tank long enough) the field is wrecked. It will NOT recover.

So the issue is that we could not pump our tank because a giant tree is growing over it and it is slanted into the ground. We have a really small house with one toilet. And it is slow at times, but no backing up thank goodness. I also needed to vent and new perspectives on the septic system since we are new to all this. This is past week, my husband and I bought an axe and root saw and we tore apart all of roots above it so we can access one hatch. There is a gap between the lids (less than an inch) that were covered with garbage bags. When removed, we noticed that every time we take a shower or flush the toilet, it over flows into that hole. Not a nasty smell -- just a bit icky. As for the temporary solution -- we are planning on getting it pumped now that we can get it open and seeing if that solves our issue for now. It was hard work for the two of us, but we are glad we finished. As for the price of the septic tank, it is for a tiny house (we are at 1000 sq. ft.) with only one bathroom. Honestly, it is a small apartment size. 10k is a significant percentage of the house value which is the issue. We won't likely recoup a lot of that value unfortunately. The other complication is that they want us to raise the lines above ground so we would have to build a hill into our backyard which is unpreferred. Although I guess it would be more exercise for my overweight dog. You know, throw treats on top of the hill.

Hi @Simplysherona, sorry if I sound patronizing, but I am afraid for you and want to ensure you get the very best advice you can before you purchase this property. Posting on Houzz is great to give you direction, but if you go into this transaction without knowing your options and risks from a local expert, you may pay for this for a long time. A holding tank may be perfectly adequate and the cost to pump it out regularly may be very reasonable, but until you have real information from people in your area, it's only a guess. You indicated there was a previous septic system. Do you have it in writing that the previous tank was removed and remediation was done properly? Have you talked to the neighbors and found out their experiences with the holding tank setup? So many questions need to be answered. I have totally been star struck with houses e.g. our first house, a 1880's shotgun, did not have a sink in the bathroom. I didn't notice that until after the purchase. Duh. In our 1940's second house, the washing machine drained into the back of the three acre property. That was all fine until Chicago winter set in, the drains froze and I had to manually start and stop the washer to haul water out until it drained. Who knew to ask these things before we bought? Certainly not us as we were young fixer uppers, struck by the possibilities of the house, not the as is. $$$$ duh. No one on Houzz can answer the questions you asked in your last post unless they inspect the property. Get real advice from local experts. You can never do too much due diligence. I want you to have a lovely lake house, not a nightmare.