Hello! One strategy that has worked well for me is conducting usability testing with individuals with disabilities. This early feedback helps identify critical accessibility issues and prioritize fixes without wasting resources on unnecessary modifications. Leveraging the expertise of accessibility testers can save both time and money in the long run. Engage with your stakeholders, including learners with disabilities, to gain insights into their specific needs and preferences. This user-centered approach ensures that you’re investing your limited resources in the right places, addressing the most pressing accessibility concerns first. By involving the end-users in the design process, you’ll create a more inclusive eLearning experience while staying within budget. 

Prioritize high-impact, low-cost accessibility improvements and gradually allocate resources to tackle more complex requirements. Repurpose existing eLearning assets by making slight modifications to enhance accessibility without significant expenses. Additionally, using authoring tools like Adobe Captivate ensures that you can create accessible courses faster. 

Since you tagged Adobe Captivate, you have one of the best tools for accessibility. Why do you tell that this leads to budget limitation? Of course it depends on the type of course and topics. But it is daydreaming to require that each course should be accessible to everyone. How can a visual impaired person consume a Photoshop course?