Since you are in the UK I would recommend looking on the Gumtree site as there are some great deals to be had from professional shops. Also noticed that you said you cannot afford much so if push comes to shove I would suggest you getting an oven like the one you have at home to help you out until you have saved enough money to invest in a full warranty type machine. Save money where you can until you absolutely have the money to purchase a larger oven. I did this when I first opened my bake shop and it worked beautifully. I had one used conventional oven and bought a new Garland convection oven within a year and a half by saving me pennies. Never had an issue with it after 6 and a half years-ish.
In the UK, I would recommend the Turbofan Series by Blue Seal, extremely good company and oven. I used a lot of them when I lived over there, no issues, no problems. Lincat is also a good second choice.
In the UK, I would recommend the Turbofan Series by Blue Seal, extremely good company and oven. I used a lot of them when I lived over there, no issues, no problems. Lincat is also a good second choice.
