Hello there, Ash. You can record the business expense you made with your personal savings in QuickBooks SoleTrader through the Bank transactions page.
Before recording the transaction, ensure you have a category that fits your machine purchase. You can go to the Transactions menu > Bank transactions > click the drop-down button > select Manage categories > choose a specific category.
Then, you can now manually record the expense. Just go back to the Bank transactions tab > click the New transactions > select the Type as Expenses > Enter the other details ( Payee, Amount ) > choose Business for the Use > Apply the created Category earlier.
When you pay yourself back from the business, you’ll need to "balance the scales" by repeating the steps above in the expense recording. However, change the Type to Income and select the specific Category. Furthermore, you can also upload the receipt you have.
To ensure your financial records remain accurate and compliant, I recommend consulting with your accountant before finalizing this approach.
Let us know anytime below for any other queries.